2 * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder
3 * Copyright (c) 2012 Aneesh Dogra (lionaneesh) <lionaneesh@gmail.com>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "bytestream.h"
27 typedef struct SUNRASTContext {
29 int depth; ///< depth of pixel
30 int length; ///< length (bytes) of image
31 int type; ///< type of file
32 int maptype; ///< type of colormap
33 int maplength; ///< length (bytes) of colormap
37 static void sunrast_image_write_header(AVCodecContext *avctx)
39 SUNRASTContext *s = avctx->priv_data;
41 bytestream2_put_be32u(&s->p, RAS_MAGIC);
42 bytestream2_put_be32u(&s->p, avctx->width);
43 bytestream2_put_be32u(&s->p, avctx->height);
44 bytestream2_put_be32u(&s->p, s->depth);
45 bytestream2_put_be32u(&s->p, s->length);
46 bytestream2_put_be32u(&s->p, s->type);
47 bytestream2_put_be32u(&s->p, s->maptype);
48 bytestream2_put_be32u(&s->p, s->maplength);
51 static void sunrast_image_write_image(AVCodecContext *avctx,
52 const uint8_t *pixels,
53 const uint32_t *palette_data,
56 SUNRASTContext *s = avctx->priv_data;
60 if (s->maplength) { // palettized
61 PutByteContext pb_r, pb_g;
62 int len = s->maplength / 3;
65 bytestream2_skip_p(&s->p, len);
67 bytestream2_skip_p(&s->p, len);
69 for (x = 0; x < len; x++) {
70 uint32_t pixel = palette_data[x];
72 bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
73 bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF);
74 bytestream2_put_byteu(&s->p, pixel & 0xFF);
78 len = (s->depth * avctx->width + 7) >> 3;
79 alen = len + (len & 1);
82 if (s->type == RT_BYTE_ENCODED) {
83 uint8_t value, value2;
85 const uint8_t *start = linesize < 0 ? pixels + (avctx->height - 1) * linesize
87 const uint8_t *end = linesize < 0 ? pixels - linesize
88 : pixels + avctx->height * linesize;
92 #define GET_VALUE ptr >= end || ptr < start ? 0 : x >= len ? ptr[len-1] : ptr[x]
96 while (ptr < end && ptr >= start) {
106 while (value2 == value && run < 256 && ptr < end && ptr >= start) {
116 if (run > 2 || value == RLE_TRIGGER) {
117 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
118 bytestream2_put_byteu(&s->p, run - 1);
120 bytestream2_put_byteu(&s->p, value);
121 } else if (run == 1) {
122 bytestream2_put_byteu(&s->p, value);
124 bytestream2_put_be16u(&s->p, (value << 8) | value);
127 // update data length for header
128 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
131 for (y = 0; y < avctx->height; y++) {
132 bytestream2_put_buffer(&s->p, ptr, len);
134 bytestream2_put_byteu(&s->p, 0);
140 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
142 SUNRASTContext *s = avctx->priv_data;
144 switch (avctx->coder_type) {
145 case FF_CODER_TYPE_RLE:
146 s->type = RT_BYTE_ENCODED;
148 case FF_CODER_TYPE_RAW:
149 s->type = RT_STANDARD;
152 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
153 return AVERROR(EINVAL);
156 avctx->coded_frame->key_frame = 1;
157 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
158 s->maptype = RMT_NONE;
161 switch (avctx->pix_fmt) {
162 case AV_PIX_FMT_MONOWHITE:
165 case AV_PIX_FMT_PAL8 :
166 s->maptype = RMT_EQUAL_RGB;
167 s->maplength = 3 * 256;
169 case AV_PIX_FMT_GRAY8:
172 case AV_PIX_FMT_BGR24:
178 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
179 s->size = 32 + s->maplength +
180 s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1);
185 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
186 const AVFrame *frame, int *got_packet_ptr)
188 SUNRASTContext *s = avctx->priv_data;
191 if ((ret = ff_alloc_packet(avpkt, s->size)) < 0)
194 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
195 sunrast_image_write_header(avctx);
196 sunrast_image_write_image(avctx, frame->data[0],
197 (const uint32_t *)frame->data[1],
199 // update data length in header after RLE
200 if (s->type == RT_BYTE_ENCODED)
201 AV_WB32(&avpkt->data[16], s->length);
204 avpkt->flags |= AV_PKT_FLAG_KEY;
205 avpkt->size = bytestream2_tell_p(&s->p);
209 static const AVCodecDefault sunrast_defaults[] = {
214 AVCodec ff_sunrast_encoder = {
216 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
217 .type = AVMEDIA_TYPE_VIDEO,
218 .id = AV_CODEC_ID_SUNRAST,
219 .priv_data_size = sizeof(SUNRASTContext),
220 .init = sunrast_encode_init,
221 .encode2 = sunrast_encode_frame,
222 .defaults = sunrast_defaults,
223 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
226 AV_PIX_FMT_MONOWHITE,